let express = require('express')

let app = express()

app.use((req,res,next)=>{
    res.append('Access-Control-Allow-Origin','*')
    res.append('Access-Control-Allow-headers','*')
    next()
})

app.get('/',(req,res)=>{
    res.json({
        msg:"这是首页",
    })
})
app.get('/banner',(req,res)=>{
    res.json({
        msg:"这是banner",
    })
})

app.listen(3000,()=>{
    console.log("监听3000端口");
})